English verb conjugation COULD CONCERTISE

Regular verb: concertise - concertised - concertised

Affirmation

Simple form

I could concertise
you could concertise
he could concertise
we could concertise
you could concertise
they could concertise

V-ing form

I could be concertising
you could be concertising
he could be concertising
we could be concertising
you could be concertising
they could be concertising

Perfect

I could have concertised
you could have concertised
he could have concertised
we could have concertised
you could have concertised
they could have concertised

V-ing perfect

I could have been concertising
you could have been concertising
he could have been concertising
we could have been concertising
you could have been concertising
they could have been concertising

Negation

Simple form

I couldn't concertise
you couldn't concertise
he couldn't concertise
we couldn't concertise
you couldn't concertise
they couldn't concertise

V-ing form

I couldn't be concertising
you couldn't be concertising
he couldn't be concertising
we couldn't be concertising
you couldn't be concertising
they couldn't be concertising

Perfect

I couldn't have concertised
you couldn't have concertised
he couldn't have concertised
we couldn't have concertised
you couldn't have concertised
they couldn't have concertised

V-ing perfect

I couldn't have been concertising
you couldn't have been concertising
he couldn't have been concertising
we couldn't have been concertising
you couldn't have been concertising
they couldn't have been concertising

Interrogative form

Simple form

could I concertise?
could you concertise?
could he concertise?
could we concertise?
could you concertise?
could they concertise?

V-ing form

could I be concertising?
could you be concertising?
could he be concertising?
could we be concertising?
could you be concertising?
could they be concertising?

Perfect

could I have concertised?
could you have concertised?
could he have concertised?
could we have concertised?
could you have concertised?
could they have concertised?

V-ing perfect

could I have been concertising?
could you have been concertising?
could he have been concertising?
could we have been concertising?
could you have been concertising?
could they have been concertising?

Interro-negative form

Simple form

couldn't I concertise?
couldn't you concertise?
couldn't he concertise?
couldn't we concertise?
couldn't you concertise?
couldn't they concertise?

V-ing form

couldn't I be concertising?
couldn't you be concertising?
couldn't he be concertising?
couldn't we be concertising?
couldn't you be concertising?
couldn't they be concertising?

Perfect

couldn't I have concertised?
couldn't you have concertised?
couldn't he have concertised?
couldn't we have concertised?
couldn't you have concertised?
couldn't they have concertised?

V-ing perfect

couldn't I have been concertising?
couldn't you have been concertising?
couldn't he have been concertising?
couldn't we have been concertising?
couldn't you have been concertising?
couldn't they have been concertising?

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